Wire harness welding device

Abstract

The present invention relates to the technical field of wire harness welding, and discloses a wire harness welding device, including a frame body 1, one side of the frame body 1 is provided with an automatic loading component for loading the terminals of the wire harness, the bottom inner wall of the frame body 1 is fixedly connected with a frame body 2, the top of the frame body 2 is provided with a shifting component for shifting the position of the wire harness and realizing switching between different workstations, the top of the shifting component is detachably mounted with a jacket, and the upper and lower sides of the jacket are both provided with a plurality of uniformly arranged clamping grooves. The present invention can not only double-smooth and straighten the copper wires of the wire harness wires in the jacket through the clamping straightening mechanism and the rotating straightening mechanism of the straightening component, but also use the jacket to orderly clamp and arrange the multiple strands of the wire harness, and then fix the jacket and the wire harness on the shifting component, thereby realizing the rapid arrangement and fixation of the wire harness, and realizing the switching of the wire harness between different workstations through the shifting component, and the equipment has a high degree of integration and automation.

Description

Technical Field

[0001] The invention relates to the technical field of wire harness welding, in particular to a wire harness welding device. Background Art

[0002] In the field of modern electrical and electronic equipment manufacturing, wire harnesses are key components that connect various electrical parts. Their quality and reliability directly affect the performance of the entire equipment. Wire harnesses are usually composed of multiple wires connected to corresponding terminals, and terminal welding is an important process link to achieve reliable connection between wires and terminals.

[0003] The current traditional wiring harness terminal welding method still has the following problems:

[0004] 1. Workers need to manually connect the multiple copper wires of the wiring harness to the multiple contacts of the terminal one by one, and then use welding tools to weld. Not only is the labor intensity high, but long-term repetitive operations can easily make workers tired, which in turn affects the stability of welding quality;

[0005] 2. When the copper wires of the wiring harness need to be connected on both the upper and lower sides of the terminal, not only the welding difficulty is increased, but also the welding technical requirements for workers are increased, which is not conducive to mass production;

[0006] 3. At present, after the copper wires of the wiring harness are stripped, multiple strands of copper wires are prone to bending, and the bent copper wires greatly affect the docking accuracy between the copper wires and the terminal contacts. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides a wire harness welding device, which is mainly intended to solve the problem that workers need to manually connect the multiple copper wires of the wire harness to the multiple contacts of the terminal one by one, and then use welding tools to perform welding. This is not only labor-intensive, but also the long-term repetitive operation can easily make the workers tired, thereby affecting the stability of the welding quality; and when the copper wires of the wire harness need to be connected on both the upper and lower sides of the terminal, not only the welding difficulty is increased, but also the welding technical requirements for the workers are increased, which is not conducive to mass production; and currently, after the copper wires of the wire harness are peeled, the multiple copper wires are prone to bending, and the bent copper wires greatly affect the docking accuracy of the copper wires and the terminal contacts.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A wire harness welding device comprises a frame body, one side of which is provided with an automatic loading assembly for loading terminals of the wire harness, a frame body two is fixedly connected to the bottom inner wall of the frame body one, a shifting assembly for shifting the position of the wire harness and realizing switching between different workstations is provided on the top of the frame body two, a jacket is detachably mounted on the top of the shifting assembly, a plurality of evenly arranged clamping grooves are provided on the upper and lower sides of the jacket, and the plurality of clamping grooves respectively clamp multiple strands of wires of the wire harness in an orderly manner, a straightening assembly for adjusting and straightening copper wires of multiple wires of the wire harness on the shifting assembly is provided on one side of the frame body two, the shifting assembly is located between the automatic loading assembly and the straightening assembly, a soldering assembly for simultaneously welding and fixing the terminals and both sides of the wire harness is provided on the top of the frame body one, a straightening assembly for aligning the position of the terminals before welding is provided on one side of the automatic loading assembly, the welding end positions of the wire harness of the straightening assembly and the shifting assembly and the welding end positions of the terminals of the automatic loading assembly are all at the same horizontal height.

[0010] Furthermore, the movement assembly includes two movement rails, the two movement rails are fixedly connected to the top outer wall of the frame body 2, a movement slide is slidably connected between the two movement rails via a slide, an electric push rod is fixedly connected to the inside of the frame body 2, and one end of the electric push rod is fixed to the movement slide, the top of the movement slide is fixedly connected to a rotating cylinder, the rotating end of the rotating cylinder is fixedly connected to a rotating plate, the top of the rotating plate is provided with a sleeve groove for clamping the jacket, the top of the rotating plate is provided with a plurality of slide grooves, a clamping frame is slidably connected between the plurality of slide grooves on the same side, the end of the clamping frame is provided with a pressing groove for clamping and fixing the wiring harness and the jacket, the bottom inner wall of the rotating plate is fixedly connected to two clamping cylinders distributed in an opposite manner, and one end of the piston rods of the two clamping cylinders are respectively fixed to the two clamping frames, and one side of the rotating plate is fixedly connected to a pressing frame.

[0011] On the basis of the above scheme, the straightening component includes a straightening mounting frame, which is fixedly connected to one side of the frame body, and the top of the straightening mounting frame is rotatably connected to a rotating frame through a bearing, and the two sides of the rotating frame are respectively provided with a clamping straightening mechanism for preliminarily straightening the copper wires of the multiple strands of wires in the wiring harness arranged in an orderly manner in the jacket, and a rotating straightening mechanism for further straightening. The top inner wall of the straightening mounting frame is fixedly connected to a servo for driving the rotating frame and switching the working positions of the clamping straightening mechanism and the rotating straightening mechanism, and one end of the servo output shaft passes through the straightening mounting frame and is fixed to the rotating frame.

[0012] As a further scheme of the present invention, the clamping straightening mechanism includes a removable plate one, which is removably fixed to one side of the rotating frame by screws, one side of the removable plate one is fixedly connected to a fixed plate, the top and bottom ends of the fixed plate are fixedly connected to sliding rods, and a slide is slidably connected between two adjacent slides, and the surface of the fixed plate in contact with the two slides is provided with a plurality of clamping half holes, and a straightening hole for straightening the copper wires of multiple strands of electrical wires in the wiring harness is formed between the two opposing clamping half holes, the outer sides of the plurality of slides are sleeved with a return spring one, and the two ends of the return spring one are respectively in contact with the slide and the fixed plate, one side of the removable plate one is fixedly connected to two clamping cylinders, and one end of the piston rod of the two clamping cylinders is respectively fixed to the two slides.

[0013] Furthermore, the rotary straightening mechanism includes a removable plate 2, which is removably fixed to one side of the rotating frame by screws, and the interior of the removable plate 2 is rotatably connected to multiple rotating cylinders by multiple bearings, one end of the rotating cylinder is fixedly connected to a guide cover, one end of the multiple rotating cylinders passes through the removable plate 2 and is fixedly connected to a rotating pulley, one side of the removable plate 2 is rotatably connected to two auxiliary pulleys by bearings, and the two auxiliary pulleys are connected to the multiple rotating pulleys by belt transmission, and one side of the removable plate 2 is fixedly connected to a rotating motor, and one end of the output shaft of the rotating motor is fixed to one of the auxiliary pulleys.

[0014] The lifting of the ...

[0015] As a further scheme of the present invention, the guide mechanism includes two guide bar support plates, an upper guide bar and a lower guide bar are fixedly connected between the two guide bar support plates, one side of the upper guide bar and the lower guide bar are provided with a side slot, one side of the upper guide bar and the lower guide bar are fixedly connected with a guide pressure plate for blocking the side edges of the side slot, an inner slot is provided inside the lower guide bar, and a guide groove cavity that imitates the cross-section of the upper material plate is formed between the upper guide bar, the lower guide bar and the guide pressure plate.

[0016] Furthermore, the straightening assembly includes two vertical poles, both of which are fixedly connected to one side of one of the guide pressure plates, a straightening frame is slidably connected between the two vertical poles, a top block is fixedly connected to the top of the straightening frame, and a straightening groove for straightening and pressing the terminal in the terminal groove is provided on one side of the top block, and two return springs are sleeved on one side of the two vertical poles, and the two ends of the return springs are respectively fixed to the vertical pole and the straightening frame, and the straightening frame is in contact with the pressure frame.

[0017] On the basis of the above scheme, the soldering assembly includes a transverse guide rail, which is fixedly connected to the top of the top plate, one side of the transverse guide rail is slidably connected to a vertical plate through two slides, the inner side of the vertical plate is fixedly connected to two vertical guide rails, and two relatively distributed adjustment frames are slidably connected between the two vertical guide rails through slides respectively, and fixed connecting heads and tin wire heads are provided at the end positions of the two adjustment frames. A driving mechanism for driving the two adjustment frames to move synchronously toward each other is provided on the outer side of the vertical plate, and a synchronous pulley two is rotatably connected to the top of the top plate through a vertical bearing seat, and a transverse driving motor is fixedly connected to the top of the top plate, and a synchronous pulley one is keyed to one end of the output shaft of the transverse driving motor, and the synchronous pulley one and the synchronous pulley two are connected by a synchronous belt transmission, and the synchronous belt is fixedly connected to the vertical plate by a connecting block.

[0018] As a further solution of the present invention, the driving mechanism includes a guide rail frame, which is fixedly connected to the outer side of the vertical plate, and two internal gear racks distributed in an opposing manner are slidably connected inside the guide rail frame. The outer side of the vertical plate is rotatably connected to a gear through a bearing, and the gear is located between the two internal gear racks and meshes with the tooth grooves of the two internal gear racks. One side of the two internal gear racks is fixed to two adjustment racks through connecting arms respectively, and an adjusting cylinder is fixedly connected to the outer side of the vertical plate, and one end of the adjusting cylinder piston rod is fixed to one of the internal gear racks.

[0019] Compared with the prior art, the present invention provides a wire harness welding device, which has the following beneficial effects:

[0020] 1. The present invention adopts a jacket to arrange the multiple strands of wires in an orderly manner, and then fixes the jacket and the wire harness on a shifting component, thereby realizing rapid arrangement and fixation of the wire harness, and switching of the wire harness at different workstations through the shifting component, and the equipment has a high degree of integration and automation.

[0021] 2. The present invention double-smoothes and straightens the copper wires of the wiring harness wires in the jacket through the clamping straightening mechanism and the rotating straightening mechanism of the straightening assembly, so as to facilitate the subsequent insertion into the contact points on both sides of the terminal.

[0022] 3. The present invention clamps the loading plate between the guide grooves formed between the upper guide bar, the lower guide bar and the guide pressure plate, which not only enables the loading plate to be positioned and guided, but also has high stability and strength and is not easily deformed under extrusion.

[0023] 4. The present invention realizes the gradual movement of the loading plate by moving the loading ball arranged on the outer side of the circumference of the loading turntable of the automatic loading assembly 7 to move the loading hole groove, and at the same time, the precise control of the moving distance of the loading plate is realized through the coordinated use of the light detector and the code disk.

[0024] 5. The present invention adopts a straightening assembly to straighten the terminal to be welded, thereby effectively avoiding the terminal from being skewed during subsequent welding.

[0025] 6. The present invention adopts a soldering assembly to simultaneously weld the copper wires of multiple strands of electric wires located on both sides of the terminal by means of upper and lower synchronous welding, thereby effectively improving the welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the front three-dimensional structure of a wire harness welding device proposed by the present invention;

[0027] Figure 2 A schematic diagram of the structure of a moving assembly of a wire harness welding device proposed by the present invention;

[0028] Figure 3 A wire harness welding device proposed by the present invention Figure 2 A schematic diagram of a local enlarged structure;

[0029] Figure 4 This is a schematic structural diagram of a straightening component of a wire harness welding device proposed by the present invention;

[0030] Figure 5 This is a schematic structural diagram of a clamping straightening mechanism of a wire harness welding device proposed by the present invention;

[0031] Figure 6 This is a schematic structural diagram of a rotary straightening mechanism of a wire harness welding device proposed by the present invention;

[0032] Figure 7 A wire harness welding device proposed by the present invention Figure 6 Schematic diagram of the rear structure;

[0033] Figure 8 A wire harness welding device proposed by the present invention Figure 1 A partial enlarged schematic diagram of

[0034] Fig. 9 A schematic diagram of the structure of a soldering assembly of a wire harness welding device proposed by the present invention;

[0035] Fig.10 A wire harness welding device proposed by the present invention Fig. 9 A schematic diagram of the enlarged structure of part A;

[0036] Fig.11 This is a schematic diagram of the structure of an automated feeding assembly of a wire harness welding device proposed by the present invention;

[0037] Fig.12 A wire harness welding device proposed by the present invention Fig.11 A schematic diagram of the enlarged structure of part B;

[0038] Fig.13 A schematic diagram of the structure of a straightening assembly of a wire harness welding device proposed by the present invention;

[0039] Fig.14 This is an exploded schematic diagram of a guide mechanism of a wire harness welding device proposed by the present invention;

[0040] Fig.15 The present invention provides a schematic cross-sectional view of a loading plate of a wire harness welding device.

[0041] In the figure: 1, frame 1; 2, frame 2; 3, straightening assembly; 4, shifting assembly; 5, soldering assembly; 6, straightening assembly; 7, automatic feeding assembly; 8, electric push rod; 9, shifting slide; 10, rotating cylinder; 11, rotating plate; 12, clamping sleeve; 13, sleeve groove; 14, clamping groove; 15, pressing frame; 16, clamping cylinder; 17, clamping frame; 18, pressing groove; 19, slide groove; 20, straightening mounting frame ; 21. Servo; 22. Rotating frame; 23. Clamping straightening mechanism; 24. Removable plate 1; 25. Rotating straightening mechanism; 26. Removable plate 2; 27. Return spring 1; 28. Slide; 29. ​​Clamping cylinder; 30. Fixed plate; 31. Clamping half hole; 32. Guide cover; 33. Rotating cylinder; 34. Rotating pulley; 35. Rotating motor; 36. Auxiliary pulley; 37. Side plate; 38. Top plate ; 39, horizontal guide rail; 40, vertical plate; 41, horizontal drive motor; 42, synchronous pulley 1; 43, synchronous belt; 44, synchronous pulley 2; 45, welding head; 46, tin wire head; 47, adjustment frame; 48, vertical guide rail; 49, adjustment cylinder; 50, guide rail frame; 51, internal gear frame; 52, gear; 53, connecting arm; 54, guide mechanism; 55, feeding plate; 56, feeding motor; 57 , photodetector; 58, encoder; 59, feeding turntable; 60, mounting seat; 61, feeding ball; 62, feeding hole slot; 63, top block; 64, vertical rod; 65, reset spring 2; 66, straightening frame; 67, straightening slot; 68, upper guide strip; 69, inner slot; 70, lower guide strip; 71, side slot; 72, guide pressure plate; 73, guide strip support plate; 74, terminal slot; 75, arc surface. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0044] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] Reference Figure 1-Figure 15A wire harness welding device comprises a frame 1, one side of the frame 1 is provided with an automatic feeding component 7 for feeding the terminals of the wire harness, the bottom inner wall of the frame 1 is fixed with a frame 2 by bolts, the top of the frame 2 is provided with a shifting component 4 for shifting the position of the wire harness and realizing switching between different workstations, the top of the shifting component 4 is detachably mounted with a jacket 12, the upper and lower sides of the jacket 12 are provided with a plurality of uniformly arranged clamping grooves 14, and the plurality of clamping grooves 14 respectively clamp the multiple strands of wires of the wire harness in an orderly manner, one side of the frame 2 is provided with a straightening component 3 for adjusting and straightening the copper wires of the multiple wires of the wire harness on the shifting component 4, the shifting component 4 is located between the automatic feeding component 7 and the straightening component 3, the top of the frame 1 A soldering assembly 5 is provided for simultaneously welding both sides of the terminal and the wiring harness, and a straightening assembly 6 is provided on one side of the automatic feeding assembly 7 for straightening the position of the terminal before welding. The welding end position of the wiring harness of the straightening assembly 3 and the shifting assembly 4 and the welding end position of the terminal of the automatic feeding assembly 7 are all at the same horizontal height. When in use, in order to solve the problem that when welding the wiring harness and the terminal, it is necessary to manually press the copper wires of the multiple strands of the wire harness on the contacts of the terminal respectively, and then use a soldering machine to perform the soldering operation, which is not only inefficient but also prone to errors, so a jacket 12 is used to clamp and arrange the multiple strands of the wire harness in an orderly manner, and then the jacket 12 and the wiring harness are fixed on the shifting assembly 4, and then the terminal is inserted into the automatic The loading component 7 is then used to gradually move the arranged terminals to the welding station through the automatic loading component 7, and then the displacement component 4 is rotated counterclockwise by ninety degrees and slowly moved toward the straightening component 3 until the copper wires of the multiple strands of wires in the wiring harness are located in the straightening station, thereby the copper wires of the multiple strands of wires in the wiring harness in the jacket 12 are simultaneously smoothed and straightened by the straightening component 3, so as to facilitate the subsequent insertion into the contact points on both sides of the terminal, and then the displacement component 4 is rotated clockwise by one hundred and eighty degrees and slowly moved toward the automatic loading component 7 until the copper wires of the multiple strands of wires in the wiring harness in the jacket 12 are respectively inserted into the multiple contact points on the upper and lower sides of the terminal, and the jacket 12 is in contact with the terminal and a snap-on initial fixation is achieved. The terminals are located on both sides, so a soldering component 5 is used to simultaneously weld the multiple wires on both sides of the terminals through upper and lower synchronous welding, which effectively improves the welding efficiency. Since the terminals inserted in the automatic feeding component 7 are prone to tilt during the moving feeding process, a straightening component 6 is used to straighten the terminals to be welded, which effectively avoids the terminal from being skewed during subsequent welding. After welding, it is only necessary to move the component 4 away from the welding station. At this time, the terminal will be pulled out together with the wiring harness, and then rotated counterclockwise ninety degrees to reset, so that it is convenient for the staff to take the wiring harness terminal after welding. In this welding device, each process is closely coordinated, the degree of automation is high, and the welding is accurate and efficient.

[0046] In order to realize the switching of the wiring harness at different workstations, the shifting assembly 4 in the present invention includes two shifting guide rails, both of which are fixed to the top outer wall of the frame body 2 by bolts, and a shifting slide 9 is slidably connected between the two shifting guide rails through a slide, an electric push rod 8 is fixed to the interior of the frame body 2 by bolts, and one end of the electric push rod 8 is fixed to the shifting slide 9, a rotating cylinder 10 is fixed to the top of the shifting slide 9 by bolts, and a rotating plate 11 is fixed to the rotating end of the rotating cylinder 10 by bolts, a sleeve groove 13 for clamping the jacket 12 is provided on the top of the rotating plate 11, a plurality of slide grooves 19 are provided on the top of the rotating plate 11, a clamping frame 17 is slidably connected between the plurality of slide grooves 19 on the same side, a pressing groove 18 is provided at the end of the clamping frame 17 for pressing and fixing the wiring harness and the jacket 12, and a pressing groove 18 is provided on the bottom inner wall of the rotating plate 11 by bolts Two clamping cylinders 16 are arranged in an opposed manner, and one end of the piston rods of the two clamping cylinders 16 are fixed to two clamping frames 17 respectively. A clamping frame 15 is fixed to one side of the rotating plate 11 by bolts. When in use, the electric push rod 8 is started to make the electric push rod 8 complete the movement of the displacement slide plate 9 along the displacement guide rail through the action of extension or shortening, and then the rotating cylinder 10 is started to complete the clockwise or counterclockwise rotation of the rotating plate 11 by ninety degrees or one hundred and eighty degrees. When placing and installing the jacket 12, the jacket 12 and the wiring harness are clamped in the sleeve groove 13 opened at the top of the rotating plate 11, and then the two clamping cylinders 16 are started at the same time. The two clamping cylinders 16 are shortened to drive the two clamping frames 17 to move inward along the slide groove 19 to the extreme position. At this time, the two clamping frames 17 are in contact with each other, and the pressing groove 18 opened at their ends completes the pressing and fixing action of the jacket 12.

[0047] In order to smooth and straighten the copper wires of the wiring harness in the jacket, the straightening assembly 3 in the present invention includes a straightening mounting frame 20, which is fixed to one side of the frame body 2 by bolts, and the top of the straightening mounting frame 20 is rotatably connected to a rotating frame 22 through a bearing, and the two sides of the rotating frame 22 are respectively provided with a clamping straightening mechanism 23 for preliminarily straightening the copper wires of the multiple strands of wires in the wiring harness arranged in an orderly manner in the jacket 12, and a rotary straightening mechanism 25 for further straightening, and a steering gear 21 for driving the rotary frame 22 and switching the clamping straightening mechanism 23 and the rotary straightening mechanism 25 is fixed to the top inner wall of the straightening mounting frame 20 by bolts, and one end of the output shaft of the steering gear 21 passes through the straightening mounting frame 20 and is fixed to the rotating frame 22, and the clamping straightening mechanism 23 and the rotary straightening mechanism 25 are fixed to the rotating frame 22. The straightening mechanism 23 includes a detachable plate 24, which is detachably fixed to one side of the rotating frame 22 by screws, a fixed plate 30 is fixed to one side of the detachable plate 24 by bolts, and sliding rods are fixed to the top and bottom ends of the fixed plate 30 by bolts, and a slide 28 is slidably connected between two adjacent slides, and a plurality of clamping half holes 31 are provided on the contact surface of the fixed plate 30 and the two slides 28, and a straightening hole for straightening the copper wires of the multiple wires of the wiring harness is formed between the two opposite clamping half holes 31, and a return spring 27 is sleeved on the outer side of the plurality of slides, and the two ends of the return spring 27 are respectively in contact with the slide 28 and the fixed plate 30, and two clamping cylinders 29 are fixed to one side of the detachable plate 24 by bolts, and the two clamping cylinders 29 are fixed to the two ends of the fixed plate 30 by bolts. One end of the piston rod of the cylinder 29 is fixed to the two slides 28 respectively, and the rotary straightening mechanism 25 includes a removable plate 26, which is removably fixed to the other side of the rotating frame 22 by screws, and the interior of the removable plate 26 is rotatably connected to multiple rotating cylinders 33 through multiple bearings, and a guide cover 32 is welded to one end of the rotating cylinder 33, and one end of the multiple rotating cylinders 33 passes through the removable plate 26 and is fixed with a rotating pulley 34 by bolts, and one side of the removable plate 26 is rotatably connected to two auxiliary pulleys 36 through bearings, and the two auxiliary pulleys 36 are connected to the multiple rotating pulleys 34 by belt transmission, and a rotating motor 35 is fixed to one side of the removable plate 26 by bolts, and one end of the output shaft of the rotating motor 35 is connected to one of the auxiliary belts The wheels 36 are fixed to each other. When in use, the straightening component 3 is moved by the shifting component 4, and the multiple strands of wires fixed in the jacket 12 are respectively clamped into the multiple clamping half holes 31 opened on the upper and lower sides of the fixing plate 30, until the clamping half holes 31 are located at the root position of the peeled bare metal copper wire of the wire, and then the two clamping cylinders 29 are started at the same time. The two clamping cylinders 29 extend and drive the slide 28 to move along the slide rod until the slide 28 contacts the fixing plate 30. At this time, the slide 28 and the multiple clamping half holes 31 opened on the fixing plate 30 form a clamping state for the bare metal copper wire of the wire, and then the shifting component 4 is moved away from the straightening component 3, so that the bare metal copper wire of the wire is straightened, and after the tension applied during straightening is released,The elasticity of the metal copper wire itself will cause it to rebound and bend a little. Therefore, by starting the steering gear 21, the steering gear 21 drives the rotating frame 22 to rotate 180 degrees, so that the clamping straightening mechanism 23 and the rotating straightening mechanism 25 are switched in the working position, and then the shifting component 4 is moved toward the straightening component 3, and the multiple wires of the wire harness fixed in the jacket 12 are respectively inserted into the rotating cylinder 33 through the guide cover 32, and then the rotating motor 35 is started. The rotating motor 35 rotates to drive one of the auxiliary pulleys 36 to rotate. At this time, the other auxiliary pulley 36 and the multiple rotating pulleys 34 are driven to rotate through the belt, and the multiple rotating pulleys 34 When the rotation occurs, the multiple rotating cylinders 33 are driven to rotate. When the multiple rotating cylinders 33 rotate, the inner wall of the rotating cylinder 33 will generate friction on the exposed metal copper wire of the wire. This friction can make the metal copper wire produce a pulling force along the axial direction of the rotating cylinder 33. From a mechanical point of view, when the metal copper wire is subjected to this axial pulling force, its curved part will tend to be stretched and straightened, so that the slightly curved part of the metal copper wire undergoes plastic deformation or elastic deformation and gradually straightens, and then moves away from the straightening component 3 through the displacement component 4, so that the exposed metal copper wire of the wire is separated from the rotating cylinder 33 and further straightened.

[0048] In order to realize the automatic and accurate movement and loading of the terminal, the automatic loading assembly 7 in the present invention includes a side plate 37, which is fixed to one side of the frame body 1 by bolts, and one side of the side plate 37 is fixed with two guide mechanisms 54 by bolts, and a loading plate 55 is provided between the two guide mechanisms 54, and one side of the loading plate 55 is provided with a plurality of terminal embedding grooves 74 for embedding and fixing the terminals at equal distances, and the outer edge of the terminal embedding groove 74 is an arc surface 75, and a plurality of loading hole grooves 62 distributed at equal distances are provided on one side of the loading plate 55 close to the top, and one side of the side plate 37 is fixed with two mounting seats 60 by bolts, A driving spindle is rotatably connected between the two mounting seats 60 through a bearing, and a side key of the driving spindle is connected to a feeding turntable 59 and a code disk 58. A plurality of feeding balls 61 are arranged at equal distances on the outer side of the circumference of the feeding turntable 59, and the feeding balls 61 correspond to the feeding hole grooves 62. A light detector 57 matched with the code disk 58 and a feeding motor 56 for realizing the rotation of the driving spindle are fixed by bolts on one side of the side plate 37. One end of the output shaft of the feeding motor 56 is fixed to the driving spindle through a coupling. The guide mechanism 54 includes two guide bar support plates 73, and the two guide bar support plates 73 are fixed by bolts. The upper guide bar 68 and the lower guide bar 70 are fixed, and a side slot 71 is provided on one side of the upper guide bar 68 and the lower guide bar 70. A guide pressing plate 72 is fixed on one side of the upper guide bar 68 and the lower guide bar 70 by bolts to block the side of the side slot 71. An inner slot 69 is provided inside the lower guide bar 70. A guide groove cavity with a cross section of the upper material plate 55 as a profile is formed between the upper guide bar 68, the lower guide bar 70 and the guide pressing plate 72. When in use, by clamping the loading plate 55 between the guide groove cavity formed between the upper guide bar 68, the lower guide bar 70 and the guide pressing plate 72, not only the loading plate 55 It is positioned and guided, and has high stability and strength, and is not easy to deform under extrusion conditions. Then, the terminal of the wiring harness is inserted into the terminal embedding groove 74 opened on one side of the loading plate 55 by a robotic arm or manually by a staff member, and then the loading motor 56 is started. The loading motor 56 rotates through the driving spindle to drive the loading turntable 59 and the code disk 58 to rotate synchronously. The loading turntable 59 rotates through the loading ball 61 set on the outer side of the circumference to move the loading hole slot 62, thereby realizing the gradual movement of the loading plate 55. At the same time, the cooperation of the light detector 57 and the code disk 58 can realize the precise control of the moving distance of the loading plate 55.

[0049] In order to avoid the problem of terminal deflection during subsequent welding, the straightening assembly 6 in the present invention includes two vertical rods 64, and the two vertical rods 64 are fixed to one side of one of the guide pressure plates 72 by bolts. A straightening frame 66 is slidably connected between the two vertical rods 64, and a top block 63 is fixed to the top of the straightening frame 66 by bolts. A straightening groove 67 for straightening and pressing the terminal in the terminal embedding groove 74 is provided on one side of the top block 63. A reset spring 65 is sleeved on one side of the two vertical rods 64, and the two ends of the reset spring 65 are respectively fixed to the vertical rod 64 and the straightening frame 66, and the straightening frame 66 and the pressure frame 15 When the wire harness enters the welding station, the pressing frame 15 moves with the shifting assembly 4 and squeezes the straightening frame 66. The straightening frame 66 is squeezed and moves inward along the two vertical poles 64, so that the straightening frame 66 drives the top block 63 to move inward, and squeezes and straightens the terminal located in the terminal embedding groove 74 through the straightening groove 67, thereby effectively avoiding the terminal from moving, deviating or being improperly installed in the terminal embedding groove 74. When the wire harness is welded and leaves the welding station, the straightening frame 66 is driven to move outward and reset along the two vertical poles 64 through the rebound reset of the reset spring 2 65.

[0050] In order to realize simultaneous welding of multiple strands of wires located on both sides of the terminal, the soldering assembly 5 in the present invention includes a transverse guide rail 39, which is fixed to the top of the top plate 38 by bolts, and one side of the transverse guide rail 39 is slidably connected to a vertical plate 40 through two slides, and the inner side of the vertical plate 40 is fixed with two vertical guide rails 48 by bolts, and two relatively distributed adjustment frames 47 are slidably connected between the two vertical guide rails 48 through slides respectively, and the end positions of the two adjustment frames 47 are provided with welding heads 45 and tin wire heads 46, and the outer side of the vertical plate 40 is provided with a driving mechanism for driving the two adjustment frames 47 to move synchronously toward each other, and the top of the top plate 38 is rotatably connected to the vertical plate 48 through a vertical bearing seat. A synchronous pulley 44 is provided on the top of the top plate 38, and a lateral drive motor 41 is fixed to the top of the top plate 38 by bolts. One end of the output shaft of the lateral drive motor 41 is keyed to a synchronous pulley 42, and the synchronous pulley 42 is connected to the synchronous pulley 44 by a synchronous belt 43. The synchronous belt 43 is connected and fixed to the vertical plate 40 by a connecting block. The driving mechanism includes a guide frame 50, which is fixed to the outer side of the vertical plate 40 by bolts. Two inner gear frames 51 distributed in an opposed manner are slidably connected in the guide frame 50. The outer side of the vertical plate 40 is rotatably connected to a gear 52 through a bearing, and the gear 52 is located between the two inner gear frames 51 and meshes with the tooth grooves of the two inner gear frames 51. The two inner gear frames 51 are meshed with the tooth grooves of the two inner gear frames 51. One side of the frame 51 is fixed to the two adjustment frames 47 through the connecting arm 53 respectively, and the outer side of the vertical plate 40 is fixed with an adjusting cylinder 49 by bolts, and one end of the piston rod of the adjusting cylinder 49 is fixed to one of the inner gear frames 51. During welding, by starting the adjusting cylinder 49, the adjusting cylinder 49 shortens and drives one of the inner gear frames 51 to move downward, while the other inner gear frame 51 moves upward synchronously under the action of the gear 52. At this time, the two inner gear frames 51 move toward each other and drive the two adjustment frames 47 to drive the welding heads 45 to move toward each other until the welding heads 45 contact the copper wires of the wiring harness wires on both sides of the terminal, and there is a gap between the welding heads 45 and the copper wires through the tin wire heads 46 extending out. Tin wire, at this time, the welding head 45 is instantly heated to melt the tin wire and weld it to the copper wire of the wiring harness and each contact point of the terminal, thereby completing the simultaneous welding of the upper and lower sides of the terminal and the multiple strands of wires in the wiring harness, effectively improving the welding efficiency. After the welding is completed, the cylinder 49 can be adjusted to extend and reset to drive the internal gear frame 51, the adjustment frame 47, the welding head 45 and the tin wire head 46 to move and reset, and by starting the transverse drive motor 41, the synchronous pulley 1 42 drives the synchronous pulley 2 44 to rotate through the synchronous belt 43, so that the synchronous belt 43 drives the vertical plate 40 to move along the transverse guide rail 39, thereby realizing the fine adjustment of the welding position of the welding head 45 and the avoidance operation of the welding head 45.

[0051] The present invention is divided into the following steps when used:

[0052] S1: First, the jacket 12 is used to clamp and arrange the multiple wires of the wiring harness in an orderly manner, and then the jacket 12 and the wiring harness are clamped in the sleeve groove 13 opened on the top of the rotating plate 11, and the two clamping cylinders 16 are started at the same time. The two clamping cylinders 16 are shortened and drive the two clamping frames 17 to move inward along the slide groove 19 to the limit position. At this time, the two clamping frames 17 contact each other, and the pressing groove 18 opened at the end of the two clamping frames 17 completes the clamping and fixing action of the jacket 12;

[0053] S2: Then, the rotating plate 11 is rotated counterclockwise by 90 degrees by starting the rotating cylinder 10, and then the electric push rod 8 is started to shorten the electric push rod 8 to move the moving slide plate 9 along the moving guide rail, and the multiple strands of wire harness fixed in the jacket 12 are respectively clamped into the multiple clamping half holes 31 opened on the upper and lower sides of the fixing plate 30, until the clamping half holes 31 are located at the root position of the peeled metal copper wire of the exposed wire, and then the two clamping cylinders 29 are started at the same time, and the two The clamping cylinder 29 extends and drives the slide 28 to move along the slide rod until the slide 28 contacts the fixed plate 30. At this time, the slide 28 and the multiple clamping half holes 31 opened on the fixed plate 30 form a clamping state for the exposed metal copper wire of the wire. Then, the electric push rod 8 extends to move the moving component 4 away from the straightening component 3, so that the exposed metal copper wire of the wire is straightened. After the tension applied during the straightening is released, the elasticity of the metal copper wire itself will cause it to rebound and bend slightly.

[0054] S3: Therefore, by starting the steering gear 21, the steering gear 21 drives the rotating frame 22 to rotate 180 degrees, so that the clamping straightening mechanism 23 and the rotating straightening mechanism 25 are switched, and then the electric push rod 8 is shortened to move the shifting assembly 4 toward the straightening assembly 3, and the multiple wires of the wire harness fixed in the jacket 12 are respectively inserted into the rotating cylinder 33 through the guide cover 32, and then the rotating motor 35 is started, and the rotating motor 35 rotates to drive one of the auxiliary pulleys 36 to rotate, and at this time, the other auxiliary pulley 36 and the multiple rotating pulleys 34 are driven to rotate through the belt, and the multiple rotating pulleys 34 drive the multiple The rotating cylinder 33 rotates. When the multiple rotating cylinders 33 rotate, the inner wall of the rotating cylinder 33 will generate friction force on the exposed metal copper wire of the electric wire. This friction force can make the metal copper wire generate tension along the axial direction of the rotating cylinder 33. From a mechanical point of view, when the metal copper wire is subjected to this axial tension, its curved part will tend to be stretched and straightened, so that the slightly curved part of the metal copper wire undergoes plastic deformation or elastic deformation and gradually straightens. Then, the electric push rod 8 is extended to make the displacement component 4 move away from the straightening component 3, so that the exposed metal copper wire of the electric wire is separated from the rotating cylinder 33 and further straightened.

[0055] S4: At the same time, by clamping the loading plate 55 between the guide groove cavity formed by the upper guide bar 68, the lower guide bar 70 and the guide pressure plate 72, not only the loading plate 55 is positioned and guided, but also the stability and strength are high, and it is not easy to deform under the extrusion condition. Then, the terminal of the wiring harness is inserted into the terminal embedding groove 74 opened on one side of the loading plate 55 by the robot arm or the staff manually. Then, by starting the loading motor 56, the loading motor 56 rotates through the driving spindle to drive the loading turntable 59 and the code disc 58 to rotate synchronously. The loading turntable 59 rotates through the loading ball 61 set on the outer side of the circumference to move the loading hole slot 62, so as to realize the gradual movement of the loading plate 55. At the same time, through the coordinated use of the light detector 57 and the code disc 58, the precise control of the moving distance of the loading plate 55 is realized.

[0056] S5: Then the rotating cylinder 10 is started, and the rotating plate 11 is rotated 180 degrees clockwise, and then the electric push rod 8 is extended to slowly move the shifting assembly 4 toward the automatic feeding assembly 7, until the copper wires of the multiple strands of wire harness in the jacket 12 are respectively inserted into the multiple contact points on the upper and lower sides of the terminal, and the jacket 12 is in contact with the terminal and is initially fixed by snap-on method;

[0057] S6: At this time, by starting the regulating cylinder 49, the regulating cylinder 49 shortens and drives one of the inner gear racks 51 to move downward, while the other inner gear rack 51 moves upward synchronously under the action of the gear 52. At this time, the two inner gear racks 51 move toward each other and drive the two regulating racks 47 to drive the welding head 45 to move toward each other until the welding head 45 contacts the copper wires of the wiring harness wires on both sides of the terminal, and there is a tin wire extending through the tin wire head 46 between the welding head 45 and the copper wire. At this time, the welding head 45 is instantly heated to melt the tin wire and weld it to the copper wires of the wiring harness wires and each contact point of the terminal, thereby completing the simultaneous welding of the upper and lower sides of the terminal with multiple strands of wires in the wiring harness, effectively improving the welding efficiency;

[0058] S7: When the wire harness enters the welding station, the pressing frame 15 moves with the shifting assembly 4 and squeezes the straightening frame 66. The straightening frame 66 is squeezed and moves inward along the two vertical rods 64, so that the straightening frame 66 drives the top block 63 to move inward, and squeezes and straightens the terminal located in the terminal embedding groove 74 through the straightening groove 67, thereby effectively preventing the terminal from moving or being misplaced in the terminal embedding groove 74.

[0059] S8: After welding is completed, the adjusting cylinder 49 can be extended and reset to drive the internal gear frame 51, the adjusting frame 47, the welding head 45 and the tin wire head 46 to move and reset, and then the electric push rod 8 can be shortened to move the assembly 4 away from the welding station. At this time, the terminal will be pulled out together with the wiring harness, and at the same time, the rebound reset of the reset spring 2 65 can drive the straightening frame 66 to move outward along the two vertical poles 64 to reset, and then the rotating cylinder 10 is started and the rotating plate 11 is rotated counterclockwise by 90 degrees to reset, so that it is convenient for the staff to take the wiring harness terminal after welding. This welding device has close coordination of each process, high degree of automation, and accurate welding and high efficiency.

[0060] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A wire harness welding device, comprising a frame (1), characterized in that: One side of the frame body 1 (1) is provided with an automatic loading component (7) for loading the terminals of the wiring harness; the bottom inner wall of the frame body 1 (1) is fixedly connected to the frame body 2 (2); the top of the frame body 2 (2) is provided with a shifting component (4) for shifting the position of the wiring harness and realizing switching between different workstations; the top of the shifting component (4) is detachably mounted with a jacket (12); the upper and lower sides of the jacket (12) are both provided with a plurality of uniformly arranged clamping grooves (14); and the plurality of clamping grooves (14) respectively clamp the plurality of wires of the wiring harness in an orderly manner; one side of the frame body 2 (2) is provided with a shifting component (4) for shifting the position of the wiring harness and realizing switching between different workstations; A straightening component (3) is provided for adjusting and straightening the copper wires of the plurality of electric wires of the wiring harness on the component (4); the displacement component (4) is located between the automatic feeding component (7) and the straightening component (3); a soldering component (5) is provided on the top of the frame (1) for simultaneously welding and fixing the terminals and the two sides of the wiring harness; a straightening component (6) is provided on one side of the automatic feeding component (7) for straightening the position of the terminals before welding; the welding end positions of the wiring harness of the straightening component (3) and the displacement component (4) and the welding end positions of the terminals of the automatic feeding component (7) are all in At the same horizontal height, the shifting assembly (4) comprises two shifting guide rails, both of which are fixedly connected to the top outer wall of the frame body 2 (2), a shifting slide plate (9) is slidably connected between the two shifting guide rails via a slide table, an electric push rod (8) is fixedly connected inside the frame body 2 (2), and one end of the electric push rod (8) is fixed to the shifting slide plate (9), a rotating cylinder (10) is fixedly connected to the top of the shifting slide plate (9), a rotating end of the rotating cylinder (10) is fixedly connected to a rotating plate (11), and a clamping sleeve (12) is provided on the top of the rotating plate (11) A sleeve groove (13) for clamping, a plurality of slide grooves (19) are provided on the top of the rotating plate (11), a clamping frame (17) is slidably connected between the plurality of slide grooves (19) on the same side, a pressing groove (18) is provided at the end of the clamping frame (17) for pressing and fixing the wire harness and the jacket (12), two pressing cylinders (16) arranged in an opposed manner are fixedly connected to the inner wall of the bottom of the rotating plate (11), and one end of the piston rods of the two pressing cylinders (16) are respectively fixed to the two clamping frames (17), and a pressing frame (15) is fixedly connected to one side of the rotating plate (11); The straightening assembly (3) comprises a straightening mounting frame (20), the straightening mounting frame (20) being fixedly connected to one side of the frame body (2), the top end of the straightening mounting frame (20) being rotatably connected to a rotating frame (22) via a bearing, the two sides of the rotating frame (22) being respectively provided with a clamping straightening mechanism (23) for preliminarily straightening the copper wires of the multiple strands of wires in the orderly arranged wiring harness in the jacket (12) and a rotating straightening mechanism (25) for further straightening, the top inner wall of the straightening mounting frame (20) being fixedly connected to a steering gear (21) for driving the rotating frame (22) and switching the clamping straightening mechanism (23) and the rotating straightening mechanism (25) between workstations, and one end of an output shaft of the steering gear (21) passing through the straightening mounting frame (20) and being fixed to the rotating frame (22); The automatic loading assembly (7) comprises a side plate (37), the side plate (37) being fixedly connected to one side of the frame body (1), one side of the side plate (37) being fixedly connected to two guide mechanisms (54), a loading plate (55) being arranged between the two guide mechanisms (54), one side of the loading plate (55) being provided with a plurality of terminal embedding grooves (74) for embedding and fixing the terminals at equal distances, the outer edges of the terminal embedding grooves (74) being arc surfaces (75), a side of the loading plate (55) being provided with a plurality of loading hole grooves (62) distributed at equal distances on a side close to the top, and two guide mechanisms (54) being fixedly connected to one side of the side plate (37). A mounting seat (60), a driving spindle is rotatably connected between the two mounting seats (60) via a bearing, a side key of the driving spindle is connected to a loading turntable (59) and a code disc (58), a plurality of loading balls (61) distributed at equal distances are provided on the outer circumference of the loading turntable (59), and the loading balls (61) correspond to the loading hole grooves (62), a light detector (57) matched with the code disc (58) and a loading motor (56) for realizing the rotation of the driving spindle are fixedly connected to one side of the side plate (37), and one end of the output shaft of the loading motor (56) is fixed to the driving spindle via a coupling; The straightening assembly (6) comprises two vertical rods (64), the two vertical rods (64) are fixedly connected to one side of one of the guide pressure plates (72), a straightening frame (66) is slidably connected between the two vertical rods (64), a top block (63) is fixedly connected to the top of the straightening frame (66), a straightening groove (67) for straightening and pressing the terminal in the terminal embedding groove (74) is provided on one side of the top block (63), a second return spring (65) is sleeved on one side of the two vertical rods (64), and two ends of the second return spring (65) are respectively fixed to the vertical rod (64) and the straightening frame (66), and the straightening frame (66) can contact the pressure frame (15); The soldering assembly (5) comprises a transverse guide rail (39), the transverse guide rail (39) being fixedly connected to the top of the top plate (38), one side of the transverse guide rail (39) being slidably connected to a vertical plate (40) via two slides, the inner side of the vertical plate (40) being fixedly connected to two vertical guide rails (48), two relatively distributed adjustment frames (47) being slidably connected between the two vertical guide rails (48) via slides respectively, the ends of the two adjustment frames (47) being provided with fixed connectors (45) and solder wire heads (46), the vertical plate (40) A driving mechanism for driving the two adjustment frames (47) to move synchronously toward each other is provided on the outer side, the top of the top plate (38) is rotatably connected to a synchronous pulley 2 (44) via a vertical bearing seat, the top of the top plate (38) is fixedly connected to a transverse driving motor (41), one end of the output shaft of the transverse driving motor (41) is key-connected to a synchronous pulley 1 (42), and the synchronous pulley 1 (42) and the synchronous pulley 2 (44) are connected to each other via a synchronous belt (43), and the synchronous belt (43) is fixedly connected to the vertical plate (40) via a connecting block.

2. A wire harness welding device according to claim 1, characterized in that: The clamping straightening mechanism (23) comprises a detachable plate (24) which is detachably fixed to one side of the rotating frame (22) by means of screws; a fixed plate (30) is fixedly connected to one side of the detachable plate (24); both ends of the top and bottom of the fixed plate (30) are fixedly connected to sliding rods; a sliding frame (28) is slidably connected between two adjacent sliding rods; and a plurality of clamping holes are provided on the surfaces of the fixed plate (30) in contact with the two sliding frames (28). A half hole (31) is formed between two opposite clamping half holes (31) to form a straightening hole for straightening the copper wires of the multiple wires in the wiring harness. The outer sides of the multiple slide bars are sleeved with a return spring (27), and the two ends of the return spring (27) are respectively in contact with the slide (28) and the fixed plate (30). One side of the detachable plate (24) is fixedly connected to two clamping cylinders (29), and one end of the piston rod of the two clamping cylinders (29) is respectively fixed to the two slides (28).

3. A wire harness welding device according to claim 2, characterized in that: The rotary straightening mechanism (25) comprises a removable plate (26) which is removably fixed to the other side of the rotating frame (22) by means of screws; a plurality of rotating cylinders (33) are rotatably connected to the interior of the removable plate (26) by means of a plurality of bearings; one end of the rotating cylinder (33) is fixedly connected to a guide cover (32); one end of each of the plurality of rotating cylinders (33) passes through the removable plate (26) and is fixedly connected to a rotating pulley (34); one side of the removable plate (26) is rotatably connected to two auxiliary pulleys (36) by means of bearings; the two auxiliary pulleys (36) and the plurality of rotating pulleys (34) are connected to each other by means of belt transmission; one side of the removable plate (26) is fixedly connected to a rotating motor (35); one end of an output shaft of the rotating motor (35) is fixedly connected to one of the auxiliary pulleys (36).

4. A wire harness welding device according to claim 3, characterized in that: The guide mechanism (54) comprises two guide bar support plates (73), an upper guide bar (68) and a lower guide bar (70) are fixedly connected between the two guide bar support plates (73), a side slot (71) is provided on one side of the upper guide bar (68) and the lower guide bar (70), a guide pressing plate (72) is fixedly connected on one side of the upper guide bar (68) and the lower guide bar (70) for blocking the side edge of the side slot (71), an inner slot (69) is provided inside the lower guide bar (70), and a guide slot cavity is formed between the upper guide bar (68), the lower guide bar (70) and the guide pressing plate (72) in the shape of a cross section of the upper material plate (55).

5. A wire harness welding device according to claim 4, characterized in that: The driving mechanism comprises a guide rail frame (50), the guide rail frame (50) being fixedly connected to the outside of the vertical plate (40), two internal gear racks (51) being slidably connected in the guide rail frame (50) and being distributed in an opposing manner, a gear (52) being rotatably connected to the outside of the vertical plate (40) via a bearing, and the gear (52) being located between the two internal gear racks (51) and meshing with tooth grooves of the two internal gear racks (51), one side of the two internal gear racks (51) being fixed to two adjustment racks (47) via connecting arms (53), and an adjustment cylinder (49) being fixedly connected to the outside of the vertical plate (40), and one end of a piston rod of the adjustment cylinder (49) being fixed to one of the internal gear racks (51).

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